1640409119 has 2 divisors, whose sum is σ = 1640409120. Its totient is φ = 1640409118.

The previous prime is 1640409109. The next prime is 1640409223. The reversal of 1640409119 is 9119040461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640409119 is a prime.

It is a super-2 number, since 2×1640409119² = 5381884155396712322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640409109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820204559 + 820204560.

It is an arithmetic number, because the mean of its divisors is an integer number (820204560).

Almost surely, 2^1640409119 is an apocalyptic number.

1640409119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640409119 is an equidigital number, since it uses as much as digits as its factorization.

1640409119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1640409119 is about 40501.9643844592. The cubic root of 1640409119 is about 1179.3717614833.

The spelling of 1640409119 in words is "one billion, six hundred forty million, four hundred nine thousand, one hundred nineteen".